<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button
            type="primary"
            @click="roleDialogVisible=true"
          >添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table
        :data="roleList"
        border
        stripe
      >
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom',i1===0 ? 'bdtop' :'','vcenter']"
              v-for="(item1,i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row,item1.id)"
                >{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二、三级权限 -->
              <el-col :span="19">
                <!-- 通过 for 循环，嵌套二级权限 -->
                <el-row
                  :class="[i2===0 ? '':'bdtop','vcenter']"
                  v-for="(item2,i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row,item2.id)"
                    >{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3,i3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row,item3.id)"
                    >
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>{{scope.row}}</pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column
          type="index"
          label="#"
        ></el-table-column>
        <el-table-column
          label="角色名称"
          prop="roleName"
        ></el-table-column>
        <el-table-column
          label="角色描述"
          prop="roleDesc"
        ></el-table-column>
        <el-table-column
          label="操作"
          width="350px"
        >
          <template slot-scope="scope">
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="min"
              @click="showEditDialog(scope.row.id)"
            >编辑</el-button>
            <el-button
              type="danger"
              icon="el-icon-delete"
              @click="removeRoleById(scope.row.id)"
            >删除</el-button>
            <el-button
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
            >分配权限</el-button>
          </template>
        </el-table-column>

      </el-table>

      <!-- 添加角色对话框 -->
      <el-dialog
        title="添加用户"
        :visible.sync="roleDialogVisible"
        width="50%"
        @close="roleDialogClosed"
      >
        <!-- 内容主体区域 -->
        <el-form
          :model="addRoleForm"
          :rules="addRoleFormRules"
          ref="addRoleFormRef"
          label-width="80px"
        >
          <el-form-item
            label="角色名"
            prop="roleName"
          >
            <el-input v-model="addRoleForm.roleName"></el-input>
          </el-form-item>
          <el-form-item
            label="角色描述"
            prop="roleDesc"
          >
            <el-input v-model="addRoleForm.roleDesc"></el-input>
          </el-form-item>

        </el-form>
        <!-- 底部按钮区域 -->
        <span
          slot="footer"
          class="dialog-footer"
        >
          <el-button @click="roleDialogVisible = false">取 消</el-button>
          <el-button
            type="primary"
            @click="addRoles"
          >确 定</el-button>
        </span>
      </el-dialog>

      <!-- 修改角色对话框 -->
      <el-dialog
        title="修改角色信息"
        :visible.sync="editDialogVisible"
        width="50%"
        @close="editDialogClosed"
      >
        <el-form
          :model="editForm"
          :rules="editFormRules"
          ref="editFormRef"
          label-width="80px"
        >
          <el-form-item
            label="角色名"
            prop="roleName"
          >
            <el-input v-model="editForm.roleName"></el-input>
          </el-form-item>
          <el-form-item
            label="角色描述"
            prop="roleDesc"
          >
            <el-input v-model="editForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <!-- 底部按钮区域 -->
        <span
          slot="footer"
          class="dialog-footer"
        >
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button
            type="primary"
            @click="editRoleInfo"
          >确 定</el-button>
        </span>
      </el-dialog>

      <!-- 分配权限对话框 -->
      <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="50%"
        @close="setRightDialogClosed"
      >
        <!-- 树形控件 -->
        <el-tree
          :data="rightList"
          :props="treeProps"
          node-key="id"
          default-expand-all
          show-checkbox
          :default-checked-keys="defKeys"
          ref="treeRef"
        ></el-tree>
        <span
          slot="footer"
          class="dialog-footer"
        >
          <el-button @click="setRightDialogVisible = false">取 消</el-button>
          <el-button
            type="primary"
            @click="allotRights"
          >确 定</el-button>
        </span>
      </el-dialog>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //所有角色列表数据
      roleList: [],
      //控制添加用户对话框显示与隐藏
      roleDialogVisible: false,
      //添加角色的表单数据
      addRoleForm: {
        roleName: '',
        roleDesc: ''
      },
      //添加角色表单的验证规则对象
      addRoleFormRules: {
        roleName: [
          { required: true, message: '请输入角色名', trigger: 'blur' },
          { min: 2, max: 10, message: `角色名的长度在2~10个字符之间`, trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          { min: 6, max: 30, message: `角色描述的长度在6~30个字符之间`, trigger: 'blur' }
        ]
      },
      //控制之修改角色对话框的显示与隐藏
      editDialogVisible: false,
      //查询到的角色信息对象
      editForm: {},
      //修改角色的验证规则对象
      editFormRules: {
        roleName: [
          { required: true, message: '请输入新角色名', trigger: 'blur' },
          { min: 2, max: 10, message: `新角色名的长度在2~10个字符之间`, trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入新角色描述', trigger: 'blur' },
          { min: 2, max: 30, message: `新角色描述的长度在2~30个字符之间`, trigger: 'blur' }
        ]
      },
      //控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      //所有权限的数据
      rightList: [],
      //树形控件的数据绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      //默认选中的节点Id值数组
      defKeys: [],
      //当前即将分配权限的角色id
      roleId: '',
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    //获取角色列表权限
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.console.error('获取角色列表数据失败！');
      this.roleList = res.data
      // console.log(this.roleList);
    },
    //监听添加角色用户对话框的关闭事件
    roleDialogClosed() {
      this.$refs.addRoleFormRef.resetFields()
    },
    //点击按钮，添加新用户
    addRoles() {
      this.$refs.addRoleFormRef.validate(async valid => {
        console.log(valid);
        if (!valid) return
        //可以发起添加角色的网络请求
        const { data: res } = await this.$http.post('roles', this.addRoleForm)
        if (res.meta.status !== 201) return this.$message.error('添加角色用户失败')
        this.$message.success('打开角色详细数据成功')
        //隐藏添加的对话框
        this.roleDialogVisible = false
        //重新获取角色列表数据
        this.getRolesList()
      })
    },
    //展示编辑用户的对话框
    async showEditDialog(id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('打开修改详细数据失败')
      this.$message.success('打开修改角色数据成功')
      this.editForm = res.data
      this.editDialogVisible = true
    },
    //监听修改角色对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    //修改角色信息并提交
    editRoleInfo() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        console.log(this.editForm);
        //发起修改用户信息的数据请求
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
        if (res.meta.status !== 200) return this.$message.error('更新失败')
        //关闭对话框
        this.editDialogVisible = false
        //刷新数据列表
        this.getRolesList()
        //提示修改成功
        this.$message.success('更新成功')
      })
    },
    //根据Id删除对应的角色
    async removeRoleById(id) {
      // 弹框询问用户是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      })
      //如果用户确认删除，返回的结果是 字符串confirm
      //如果用户取消删除，返回的结果是 字符串cancel
      // console.log(confirmResult);
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败')
      }
      this.$message.success('删除用户成功')
      this.getRolesList()
    },
    //根据Id删除对应的权限
    async removeRightById(role, rightId) {
      //弹框提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      console.log(confirmResult);
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }

      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) return this.$message.error('删除权限失败')
      //这个会重新渲染整个表格，不推荐
      // this.getRolesList()
      role.children = res.data
    },
    //展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      //获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('获取权限数据失败！')
      //把获取到的权限数据保存到rightList中
      this.rightList = res.data
      console.log(this.rightList);

      //递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)

      //显示对话框
      this.setRightDialogVisible = true
    },
    //通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
    getLeafKeys(node, arr) {
      //如果当前 node 节点不包含 children 属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    //监听分配权限对话框的点击事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    //点击给角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) return this.$message.error('分配权限失败！')
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }

}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 10px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>